Method of making ear-wire screws.



n. w. MACMILLAN. METHOD 0F MAKING EAR WIRE SCREWS. APPLICATION FILEDSEPT. 5. I9I7. I 1,268,862. Patented June 11, 1918.

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INVENTE.:

. METHOD 0F MAKING- EAR-WIRE SGREWS. i

speeincauon of Letters ratent.- Patented June M, 1918.

:Application led September 5, 1917. Serial No. 189,872.

To all/whom t may concern.'

Be it known that I, DANmL. WmLIAM MACMILLAN, a native of Canada, residmgat Providence, in the county of Providence and- State'of Rhode Island,have invented a new and useful Improved Method of Malnzng Ear-WireScrews, of which the following is a specification.

Ear-wire'screws are used in that class of ear-ring which are clamped tothelobe of the ear. threaded stems are separately constructed in amachine to the number and length required and each screw-threaded stemthen individually handled in another machinel in the operation ofsecuring an ear-pad to the end of each screw-threaded stem.

The object of my invention is to improve the-method of making ear-wirescrews for that class of ear-rings in which the ear-ring is-secured byclamping the same to the lobe of the ear, whereby the operations ofconstructing the screw-threaded stems and fastening the ear pads to thestems, are accomplished by the use of my improved method, in onemac e.

Further objects of my invention are to increase the product and reducethe cost of manufactunng ear-wire screws .for ear- My invention consistsin the peculiar and novel method of ma ear-wire screws for ear-rings, aswill be more fully set forth hereinafter and claimed.

Figure 1 is a face view of a strip of metal on which is formed a seriesof ear-pads.

Fig. 2. a transverse sectional view taken on line.2, 2 of Fig. 1 throughthe strip and one of the ear-pads.

Fig. 3 is a side view of a portion of a screw-threaded wire from whichscrewthreaded stems are formed.

Figs. 4, 5, 6 and 7 are sectional views illustrating different steps inmy method of making the ear-wire screws, and

' .Fig-.8 is a side view of the completed earwlre screw.

All of the gures are enlarged to more clearly show the same, Fig. lapproximately two diameters and Figs. 2 to 8 approximately fourdiameters.

In the drawing 9 indicatesv a strip of metal on which are formed aseries of ear-pads 10, 10. Each ear-pad 10 has a rounded convex face 11,a cup shapedcavty 12, and a As heretofore made the screwconcentricannular depression 13 forming an annular wall 14 of the cavity, as shownin Fig. 2. The cavity 12 is shaped to receive the end of ascrew-threaded wire 15 such as shown in Fig. 3. A lower holding die 16,two upper swaging and cutting'oif dies 17 and 18 and a spring clampfeeding `device 19 are used for feeding the wire for swaging-an ear-padon to the end of the wire and for cutting a shank from the wire, asshown\ in Figs. 4, 5 and 6 and lower and upper cutting dies 20 and 21 asshown in Fig. 7, are used for cutting the completed ear-wire screw fromthe strip 9. The lower die 16 has a depression 22 in its top face whichfits the concave face of an ear-pad. The upper die 17 has a die face 23shaped to go over the wall 14 on the ear-pad and compress or swage thewall 14 on to the end of the Wire 15. The die 17A sliding on the die 18acts as a shear to cut the wire, as shown in Fig. 6,

and the spring clamp feeding device acts to feed down a predeterminedlength of wire as required. The ear-wire screw consists of a ear-pad 10and a screw-threaded stem 24 as shown in Fig. 8. f

My improved method of making ear-wire screws consists in forming aseries of earwire screw-pads 10, 10 on a metal strip 9,V

each ear-pad having a cavity 12 and an vannular wall 14, passing thestripv9`between a lower die 16 having a depression 22 and an upper die17 having a face 23, placing i an ear-pad in the depression 22,intermittently feeding a predetermined length of a practicallycontinuous screw-threaded wire 15 downward, by a spring clamp feedingdevice 19, with the end of the wire entering a cavity 12 in a pad 10, asshown in Fig. 4, closing the dies, as shown in Fi swaging the wall 14 ofthe cavlty onto the end of the wire, ting o" a predetermined length ofthe wire, thereby formingfa screw-threaded stem on the ear-pad, thencutting out the ear-pad fromthe strip'9 by dies 20 and 21 as shownV 1nFig. 7,v thereby completing an ear-wire.

screw, as shown in Fig. 8.

The principle operation in my improved method of making car-wire screwsconsists in intermittently feeding a, predetermined length ofscrew-threaded Wire to the earpads, said screw-threaded Wire coming froma reel. Although the wire is preferably cut after an ear-pad has beenswaged onto the g. 5, thereby opening the dies and cutend of the Wire,it is self evident that the wire could be cut before swaging the ear-padonto the wire.

By the use of my yimproved method of making ear-Wire screws, the timeheretofore required in manufacturing is materially lessened and theproduct greatly increased at a reduced cost.

Having thus described my invention I claim as new,

The method of making ear-Wire screws consisting in forming a series ofear-pads on a metal strip', each ear-pad having a cavity and a raisedWall surrounding the cavity passin the trip of ear-pads between 15suitable swaging dies, feeding a predetermined length of screw-threadedWire to a cavity in an ear-pad, closing the dies and swaging the Wall ofthe cavity in the earpad on to the end of the screw-threaded 20 Intestimony whereof, I have signed my 25 name to this specification.

DANIEL WILLiAM MACMILLAN,

